Swage-shaper for saws.



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PATENTBD NOV. 6, 1906. V. H. & A. K. HANCHETT.

SWAGB SHAPER FOR SAWS.

APPLICATION FILED Nov. 21. 1904.

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PATENTBD NOV. 6, 1906. V. H. & A. K. HANCHETT. SWAGB SHAPER. FOR SAWS. APPLICATION FILED Nov 21 1904 [IIIHIHI WITNESSESI INVENTORS t gan/gip@ ATTORNEY nu Nonni: r-:rsns eo.. wnsulucnw, n. c.

iff"- UNITED `STATES PATENT OFFICE.

VOLNEY H. HANCHETT AND ARTHUR K. HANCHETT, OF BIG RAPIDS,

i MICHIGAN.

vswAe.E -sl-:APEB FOR sAws.

Specification of Letters Patent.

Patented Nov. e, 1906.

Application led November 21,1904. Serial No. 233,703.

and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is an improvement in swage-shapers for saws, and relates more particu arly to a swage-shaper especially adapted for shaping or pressing the sides of the teeth on a 'band-saws, band-resaws, and gang-saws and similar saws having straight cutting edges as distinguished from circular Sa/WS.

The improvement relates more particularly to devices carried by a swage-shaper whereby the dies will always be brought to' the same relative position on each tooth when the swaging operation occurs to the effect that all the teeth may be shaped exactly the same width on the face and beveled downwardly from the point and backward from the face at the same angle from the point and face no matter what the shape of the teeth, the irregularity of spacing, or the pitch of the teeth.

Afurther obj ect is to provide means whereby the teeth of the saw are kept from striking on the sides of the shaper or on the dies as they pass by the teeth.

` A further object is to provide means whereby the swage-shaper will be guided along the sawteeth and kept from tilting upward or backward and also kept in line on the saw, the devices by which this is accomlished being vertically adjustable to reguate Athe depth or distance down that the swaging action shall take place on the teeth.

A With these objects in View the invention consists in the devices illustrated in the accompanying drawings and the equivalents l thereof.

Figure l is a side view of a swage-shaper embodying our improvements, the shalper being shown in the position it occu ies w en being moved along the teeth of a and-saw. Fig.l 2 is an enlarged side view of the ga e or "gulde by which the teeth area upon w 'ch the shaping-dies act is regulated. Fig. 3 is a part longitudinal section of the same., Fig. 4 is apart section through the opposing shaping-dies, showing them in action on a saw-tooth. Fi 5 is a side view of the arm by which the die-operatin screw isfr'otated. Fig. 6 is a perspective o one of the dies.

Fig. 7 is a partial longitudinal section, on a,

large scale, showing the o eration vof the guides. Fig. 8 is a modifie form o'f gagefor guiding-shoe.` l i The general operation of the swage-'shaper will be understood from Figs. 1 and' '4,"wh'ere A is a shell or head, in whichr` aremunted two transversely-slidable plu s B," traversed, respectively, by the ri ht an' left-handelds of the screw C, whic is actuatedthe handle D to advance' or retract the'blcks B toward or from each other'. The plu'g'sare slidably but non-rotatably held in the head A by means of the keys or feathers a. (See Fig. 7.) The plugs B carry beveled dies E, which clamp the saw-teeth and press or swage their sides into the desired form and dimensions. The screw C is actuated by the handle D, mounted loosely on the screwshaft and adjustably connected to a sector X. non-rotatably mounted on the screw-shaft.

It is evident from Fig. 4 that raising or lowering the dies E relatively to the saw F will vary the tooth area acted u on by the dies, and consequently vary the s ape of the finished tooth.

As has been previously stated, the object of our present improvement is to so guide the dies and to so adjustl their positionlrelative to the points of the successive teeth on which they operate that all the teeth will be formed exactly alike. It is essential that the head A be kept from tilting forward or backward when the lever D is rocked back and forth in the swaging operation. To accomplish this result, we secure to the head A, by screws or otherwise, a pair of horizontal projecting arms G Gr, extending forward and back of the Shaper parallel with the saw. The ends of the arms G are bifurcated horizontally, as at IOO G and a screw H passes through the upper adjusted position. Atthe lower end of'ea'chscrew H 1s a horizontal arm L, having'on its not only the vertical position ofthe dies E be exactly the same on all the teeth, but that the horizontal distance from the point of the tooth to the center of the die E be the same at each swaging operation.

I-Ieretofore it has been common to adjust the horizontal position of the dies E by means of ga es or similar devices engaging the roots of t e teeth; butit is found in prac tice that if the roots of the teeth are not, all the same depth the effect will be to produce teeth of uneven widths, causing the saw to cut nnevenly.

Inthe gage'illustrated in theA accompanying drawings itiis evident that this difliculty is obviated and a uniform width of allthe teeth is assured by arranging the gage to measure the adjustment ofthe dies from the point of the tooth instead of'from its root.

A further advantage is that the `machine when drawn forward along the teeth of the saw will automatically indicate by a clicking sound and a sli vht feeling of -raising and dropping of the s aper when the gage is at the point of the tooth, so that the operator can shape a tooth and move immediately to the next one, stopping-the machine in position for shaping the next tooth without watching the position of the guide, thereby greatly increasing the speed of operation of the machine. We attain these results by means ofthe shoe O, the lower face of which is horizontal, as at O', near the front'and inclines downwardly and rearwardly, as at O, near the back ofthe shoe. The back or toe of the shoe terminates in a projecting tooth R, adapted to pass between the dies E E and eng-age the point of the saw-tooth F. The front part of the shoe has downwardly-depending'win s S, that pass along-the sidesof the saw-teet as the shoe moves forward. Vertical adjustment of the shoe is had-by means of a screw T, passing throu h the arms G and held -in place by set-nuts The particular construction vof shoe O which we prefer to employ in practice is illustrated in Fig. 8, where the tooth R is made of tool-steel and tempered, being inserted in the slotted end of the shoe O and held in place by rivets Z Z, as shown in the drawings. By forming the inserted tooth R of hardened toolsteel upsetting its end where it comes in contact with the teeth of the band-saw is avoided, and the shoe is thus lifts the machine.

made much more durable than if the tooth R were made of iron or soft steel.

When the machine is drawn forward along the saw-teeth, as indicated in Figs. l and 7, the downwardly-extending face O rides up the inclined back of the tooth and slightly As soon 4as the point of the projecting tooth R passes the point of the saw-tooth the machine drops to place again and a slight metallic click is heard and a slight jar is felt on the handle, indicating that the machine isin position to swage the next tooth. A slight backwardmovement brings the tooth R snug up against the cutting edge of the saw-tooth, and the o erator by the movement off the handle D sliapes the sides of the teeth. A handle Gr2 is stationarily secured to the head in any suitable manner,

whereby to enable the operator to move and steady the machine during its operation.

By the means above described we have produced a 'swage-sha er for band-saws that is not only adjustab e for various sizes of saws, but is applicable to any spacing Aof teeth and produces teeth of perfectly uniform shape at their points and faces or cutting edges.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. In a swage-shaper, the combination with a slotted head and dies carried thereby, of means for preventing the tilting of the Shaper, and means for gaging the position of the shaper, said means comprising an adjustable support and a laterally-extending grooved shoe, the work adapted to be received in the groove in the shoe and a toe or tooth carried by the shoe and adapted to take against the work.

2. In a swage-shaper, the combination with a slotted head and dies carried thereby, of means for preventing the tilting of the shaper, and means for gaging the position of the Shaper, said means comprising a support adjustably mounted in advance of the dies and a rearwardly-projecting shoe, carried by the support, depending wings on the shoe between which the work is received, the lower face of the shoe at the heel being formed on a horizontal plane, and inclined downwardly to the toe of the shoe, the latter receivable in the slot in the head.

3. In a swage-shaper, the combination with a suitable slotted head andshaping means carried thereby, of means for preventing the tilting of the shaper, said means comprising arms, oppositely rejecting from the head and having open s ots at their outer ends intersected by apertures, a screw stud received in the aperture at the outer end of each arm, a depending fork carried by each of the studs and embracing the work, a nut IOC located within the slot in the outer end of studs and ada te'd to engage the arms to cooperate With the nuts'to lock the studs in adj usted position.

4. In a swage-shaper, the combination With a slotted head carrying sWage-shaping mechanism, and means for preventing the tilting of the head, of gaging means located in advance ofthe head and projecting into the slot in the head, said last-named means provided with a horizontal surface ada ted to rest upon the Work and an inclined suxFace terminating in a tooth adapted to extend to a point beneath vthe edge of the Work under treatment and to engage the work to position the Shaper.

5. In a sWage-shaper for saws, the combination with a head, swaging mechanism, and

, VOLNEY H. HANCHETT. ARTHUR K. HANCHETT.

Witnesses:

C. W. BARTON, CHAs. E. BERGER. 

